Respuestas
Respuesta:
1) (x – 2) (x + 2) 2) (a + 3) (a – 3) 3) (2x – 5) (2x + 5)
x2 + 2x – 2x – 4 a2 – 3a + 3a – 9 4x2 + 10x – 10x – 25
x2 – 4 a2 – 9 4x2 – 25
4) (3x + 2) (3x – 2) 5) (3x + y) (3x – y) 6) (5x – 2) (5x + 2)
9x2 – 6x + 6x – 4 9x2 + 3xy – 3xy – y2 25x2 + 10x – 10x – 4
9x2 – 4 9x2 – 4 25x2 – 4
no entendí la 7,8,9,10
Explicación paso a paso:
(x-2)(x+2)
=(x)² - (2)²
=x²-4
(a+3)(a-3)
=(a)²-(3)²
=a²-9
(2x-5)(2x+5)
=(2x)²-(5)²
=4x²-25
(3x+2)(3x-2)
=(3x)²-(2)²
=9x²-4
(3x+y)(3x-y)
=(3x)²-(y)²
=9x²-y²
(5x-2)(5x+2)
=(5x)²-(2)²
=25x²-4
(7a-b)(7a+b)
=(7a)²-(b)²
=49a²-b²
(5x+10y)(5x-10y)
=(5x)²-(10y)²
=25x²-100y²
(5x²-3)(5x²+3)
=(5x²)²-(3)²
=25x⁴-(9)
(7a²-2b³)(7a²+2b³)
=(7a²)²-(2b³)²
=49a⁴-4b5